In a press release this morning Capcom officially announced Resident Evil 5 is coming to the PC later this year. Also, Street Fighter IV and Bionic Commando are on track to hit the WIndows platform in July. Jeff's got a whole lot more info on the Street Fighter IV stuff in a previous story so I'd check there for information on the achievements and improvements made for that game. Here's a quote from the release detailing what Resident Evil 5 PC gamers have to look forward to:
The PC version of Resident Evil 5 will feature online play for co-operative play sessions over the internet and will also take advantage of NVIDIA®’s new GeForce® 3D Vision technology (wireless 3D Vision glasses sold separately).